Presentation on theme: "Natural Light influence in Architecture: Natural light provide a valuable amenity that tells us the time of day, weather conditions and gives a self satisfaction."— Presentation transcript:
Natural Light influence in Architecture: Natural light provide a valuable amenity that tells us the time of day, weather conditions and gives a self satisfaction feeling. Natural light in building can provide natural illumination which reduce the need for artificial lighting and therefore saves on resources. Natural light if not properly understood can be difficult to control. Hence resulting in excessive heat gain, uncomfortable glare and loss of resources. To successfully design with natural light, place the light where it is desired, through good orientation. Also avoid excessive contrasts, glare and unwanted heat gain
Building Orientation: At the planning level, orienting buildings along the north-south promote direct sunlight access, use of shadings and reflected light from the surroundings. East-west orientation will expose the facades for more light summer than in winter. Shading normal windows also blocks vision, therefore high levels windows are preferred here and if they are well shaded can provide an even distribution of light throughout the day.
Natural Light influence in Architecture: Sources of Natural Light: Daylight : diffuse light through clouds. (Sky is dominant light source). Sunlight : direct-beam sunlight through clouds or clear skies. Reflected light : light reflected from natural or man made surfaces. (ground is dominant light source).
Sunlight strategies: The sun is a powerful source of light, therefore it should be used indirectly to provide the necessary lighting. The apparent movement daily/seasonally of the sun poses difficulty in controlling the light received. The architectural design therefore should be made to accommodate this movement to achieve the required lighting levels. -Shade: Openings to prevent glare and heat gain. North-south openings illuminate horizontal surfaces well. East-west surfaces illuminate vertical surfaces well. -Redirect: Sunlight where it is needed. Light deeper plans and reduce high contrasts. -Control: the amount of light entering the space. Light areas when and where needed. -Efficiency: use light efficiently. Use bright interiors that better reflect light and reduce the amount of lighting needed. -Integrate: integrate forms of sunlight with the architecture.
Horizontal surfaces: Most abundant on the sunny side of buildings. Can be a significant source of light in both short or tall buildings. Short buildings can benefit from direct reflections from the ground. Tall buildings can benefit from horizontal surfaces attached to their facades. They can receive the highest radiation in high sun angles as such they could be a big source of glare.
Short buildings can benefit from direct reflections from the ground. Tall buildings can benefit from horizontal surfaces attached to their facades. They can receive the highest radiation in high sun angles as such they could be a big source of glare.
Vertical surfaces: Most abundant on shady sides of buildings where reflections from adjacent building facades and other vertical surfaces. They receive their highest radiation at low sun angles such as in winter times and high latitudes. Their light has large horizontal coverage but can be a source of glare therefore they can be located above eye level